Defensive publication

ABSTRACT

AN ADDITIVE SYSTEM FOR POLYVINYL CHLORIDE COMPOSITIONS WHICH INCLUDES (1) A HYDROPEROXIDE COMPONENT SUCH AS TERTIARY BUTYL HYDROPEROXIDE, CUMENE HYDROPEROXIDE, 2,5-DIMETHYL,-2,5BIS(HYDROPEROXY) HEXANE, AND PARA-METHANE HYDROPEROXIDE, (2) A POLYESTER DERIVED AT LEAST IN PART FROM 2,2,4-TRIMETHYLPENTANE-1,3-DIOL AND MALEIC ACID OR MALEIC ANHYDRIDE, (3) A COMPLEXING AGENT FOR INDUCING DECOMPOSITION OF THE HYDROPEROXIDE COMPONENT TO GIVE FREE RADICALS SUCH AS VARIABLE VALENCE METAL IONS, AUTOOXIDATIVE ORGANIC COMPOUNDS, SULFUR CONTAINING COMPOUNDS HAVING A TETRA-VALENT SULFUR ATOM DIRECTLY ATTACHED TO AT LEAST ONE OXYGEN ATOM, ACIDS HAVING AN IONIZATION CONSTANT OF AT LEAST 10**-3, AND CRYSTALLINE SUBSTANCES WHICH ABSORB THE HYDROPEROXIDE COMPONENT WITH AN ENERGY (MEASURED AT 23*C.) GREATER THAN ABOUT THREE KILOCALORIES/ MOLE OF HYDROPEROXIDE, AND WHICH DESORBS THE RESULTANT FREE RADICALS OF THE DECOMPOSED HYDROPEROXIDE COMPONENT.



